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extract parse_deref_expr

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This commit is contained in:
Mazdak Farrokhzad 2019-12-07 03:00:06 +01:00
parent ada388b2b8
commit f6ab439436
1 changed files with 13 additions and 10 deletions
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23
src/librustc_parse/parser/expr.rs
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@ -475,12 +475,7 @@ impl<'a> Parser<'a> {
let (span, e) = self.interpolated_or_expr_span(e)?;
(lo.to(span), self.mk_unary(UnOp::Neg, e))
}
token::BinOp(token::Star) => {
self.bump();
let e = self.parse_prefix_expr(None);
let (span, e) = self.interpolated_or_expr_span(e)?;
(lo.to(span), self.mk_unary(UnOp::Deref, e))
}
token::BinOp(token::Star) => self.parse_deref_expr(lo)?,
token::BinOp(token::And) | token::AndAnd => self.parse_borrow_expr(lo)?,
token::Ident(..) if self.token.is_keyword(kw::Box) => self.parse_box_expr(lo)?,
token::Ident(..) if self.is_mistaken_not_ident_negation() => {
@ -491,14 +486,22 @@ impl<'a> Parser<'a> {
return Ok(self.mk_expr(lo.to(hi), ex, attrs));
}
/// Parse `*expr`.
fn parse_deref_expr(&mut self, lo: Span) -> PResult<'a, (Span, ExprKind)> {
self.bump(); // `*`
let expr = self.parse_prefix_expr(None);
let (span, expr) = self.interpolated_or_expr_span(expr)?;
Ok((lo.to(span), self.mk_unary(UnOp::Deref, expr)))
}
/// Parse `box expr`.
fn parse_box_expr(&mut self, lo: Span) -> PResult<'a, (Span, ExprKind)> {
self.bump();
let e = self.parse_prefix_expr(None);
let (span, e) = self.interpolated_or_expr_span(e)?;
self.bump(); // `box`
let expr = self.parse_prefix_expr(None);
let (span, expr) = self.interpolated_or_expr_span(expr)?;
let span = lo.to(span);
self.sess.gated_spans.gate(sym::box_syntax, span);
Ok((span, ExprKind::Box(e)))
Ok((span, ExprKind::Box(expr)))
}
fn is_mistaken_not_ident_negation(&self) -> bool {